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Histioteuthis oceani: Description continued

Richard E. Young and Michael Vecchione
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Figure. Histioteuthis oceani, live, Hawaiian waters. Left - Oblique view of right side. Right - View of left side. Photographs by R. Young.

  1. Photophores
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    Figure. Right, ventral and left views of the head and arm bases of H. oceani in order to provide an approximate idea of the photophore arrangement, live squid, Hawaii. Photographs by R. Young.

    1. Compound photophores of uniform, medium size on anterior 3/4 of ventral mantle.
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      Figure. Ventro-lateral view of the mantle of H. oceani, Hawaii, same live squid. Photographs by R. Young.

    3. Compound photophores number usually 16 (rarely 18) around right eyelid.
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      Click on an image to view larger version & data in a new window

      Figure. Lateral view of right eyelid of H. oceani, 50 mm ML, Hawaii. Drawing from Voss et al., 1998.

    5. Arms IV with 6 longitudinal series on arm base, becoming 5 series beyond the first 1-3 diagonal rows.
    6. Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

      Figure. Ventral view of arm IV of H. oceani, 50 mm ML, Hawaii. drawing from Voss et al., 1998.

  2. Tentacles
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      Figure. Oral view of the tentacular club of H. oceani. Top - 50 mm ML, Hawaii. Drawing from Voss et al., 1998. Bottom - 60 mm ML, Hawaii. Photograph of preserved squid by R. Young.

    1. Suckers on manus in 6-7 irregular series; median suckers 1.5-2.0 times larger than ventral marginals.

  3. Sucker dentition
    1. Largest club suckers with numerous acute teeth around entire margins (drawing below right; photograph to the right).
    2. Large arm sucker rings with 6-10 blunt or square teeth of distal and lateral margins (drawing below left).
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    Click on an image to view larger version & data in a new window

    Figure. Oral views of arm and club suckers of H. oceani. Top - Arm sucker from midarm III (left), largest tentacular sucker (right), both from mature male, 50 mm ML, Hawaii. Drawings from Voss et al., 1998. Bottom - Oral view of large club suckers, 60 mm ML, Hawaii, preserved. Photograph by R. Young.

  4. Arms
    1. Subequal; length 120-150% of ML.

  5. Tubercles
    1. Ridge of low tubercles beneath epithelium on anterior half of dorsal mantle in midline ; each arm I-III with median aboral ridge of tubercles (arm 1 - 25-36 tubercles; arm II - 23-30; arm III - 17-21). Relative length of tubercle row decreasing from arm I to III.
    2. Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

      Figure. Dorsal view of head and anterior mantle of H. oceani showing tubercles, same live squid, Hawaii. Photograph by R. Young.

  6. Web and buccal crown
    1. Inner web unites basal 20-30% of arms I-III; outer web slightly developed.
    2. Buccal crown with 7 supports; supports to arms II undivided.
    3. Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

      Figure. Oral view of buccal crown of H. oceani, 50 mm ML, Hawaii. Drawing from Voss et al., 1998.

  7. Funnel organ
    1. Unsculptured.

  8. Fins
    1. Length 37-43% of ML; width 53-65% of ML.

  9. Spermatophores
    1. Length 4.0-4.2% of ML; sperm mass 6-8% of spermatophore length (SpL); cement body 58-61% of SpL; ejaculatory apparatus31-35% of SpL and with single long loop. Connective complex well developed with slender, elongate base.
      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

      Figure. Spermatophore of H. oceani with enlargement of ejaculatory-apparatus/cement-body connective complex, 50 mm ML, Hawaii. Drawing modified from Voss et al., 1998.

    2. Hectocotylus
      1. Sucker stalks on distal fourth of arms I elongate and palisaded. Swollen collars and enlargement of basal suckers absent in single small male examined.

Comments

Other than the photographs, the above description is from Voss, et al. (1998).

References

Voss, N.A. 1969. A Monograph of the Cephalopoda of the North Atlantic. The Family Histioteuthidae. Bulletin of Marine Science, 19(4):713-867.

Voss, N.A., K. N. Nesis, P. G. Rodhouse. 1998.  The cephalopod family Histioteuthidae (Oegopsida): Systematics, biology, and biogeography. In: Systematics and Biogeography of Cephalopods. (Voss, N.A., Vecchione, M., Toll, R.B. & Sweeney, M.J., eds.). Smiths. Contr. Zool., 586(2): 293-372.

About This Page


University of Hawaii, Honolulu, HI, USA


National Museum of Natural History, Washington, D. C. , USA

Page: Tree of Life Histioteuthis oceani: Description continued Authored by Richard E. Young and Michael Vecchione. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

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